Burner



Sept. 18, 1928.

2 sheets-sned- R. HOFFMAN BURNER Filed Oct. 26, 1925 Illlillllllflllllilllflfrfri 17. O f .n e U m W WM M pmm Sept. 18, 1928. 1,684,585

lR. HOFFMAN BURNER Filed Oct. 26, 1925 2 Shee'r.s-Sheefl 2 7:7106 il O7#Patented sept. 18,1928.

UNITED STATES.

31111011211 HOFFMAN, or .cLnvnLANn pero, i

BURNER.

Application nlealoctober 2e, 1925. serial No. G4342.

This invention relates to. burners for oil stoves and has forV one ofits objects vtheprovision of an improved torna of fair distrlbuter andllame spreader for use-'in connectlon with an annular Wick, that Will beof simpler `construct-ion and less expensive i'gures embodyingrmyinvention;

to manufacture thanthe devices heretofore used, Without lowering theeiciency of the burner'. v

A further .object of the invention is to provide an air. distributer forthe interior of the Wick tubethat is so constructed that it `Will beaccurately positioned andl held so that it Will not be displaced bythevvick, the part-s being also arranged so that they will vbe held inan inoperative position when not properly located'in the Wick tube, andthe fact that the parts are not properly assembled will be readilyperceived by the operator. Other objects of the invention *and thefeatures of novelty Will be apparent from the following descriptiontaken in connection Withthe accompanyingdravvings, `in Which: Fig. 1 isan elevation of a burner embodyingmyinvention, with certain parte shownin longitudinal section; l

lFig. is a llongitudinal section throughthe `Wick tube, the airdistribute-r and llame spreader unit being shown in the inoperativeposition `in which the unit will be 'held' When the parts are notproperly assembled; llig. '3 is a bottom plan with certain parts insection; 'f n Fig. t is a plan vievv of the air distributer With'theV'flame spreader removed;

5 is a vperspective view Otan air' distributing ring of slightlydifferent con-v struct-ion from that illustrated in the other d isa'vieiv similar to Fig.' 1 but showing another `form of the invention;

Fig, 7 is a bottom plan view thereof; and l8 is a vertical sectionthrough the air distributer. i i 1 n Referring -to the -draWings,-10indicates the outer Wiel; tube and 11 the inner Wick tube which arespaced apart, `according to the usual practice, to provide an annularspace for the Wick 12. The inner Wick tube is formed with a ledgel for apurpose .to be hereinafter described and has secu-red, below this ledge,a plurality -ot radially 'extending Wings or vanes 14: which vareyformed With the central raised portions 15, as

l shown'. A flame spreader 1G, in the form of ,y

a disk, has itsY peripheral portion 17 an ranged Iabove the -Wick12`and` this flame spreader is provided-With perforations 18 and issecured to a plurality of radially eX- tending win-gs or vanes 19 bymeans o-tangs 20 -Whichproject through opening-s in lthel llame spreaderl16. rllhe lower edges ofthe vanes 19 lare adapted to engage vv'ithatheledge 13 tor thepurpose of supporting the parts in proper relation tothe upper edges` of the Wick tubes, and arealso recessed-asindicated at21 to permit thev vanes 19 to clear the raised portions 15, of thevanesI 111, When' the unit, of Which the flame spreader 16 and; vanes 19are apar-t, is r0- tated. A locking memberQQ is secured to the vanes 19at the `center ot their lower edges and is provided With-.slots Q3through which the raised portions 15 are adapted to Y pass when saidunit is lowered' into posi-f tion. The raised portions'l, of the vanes14, are provided with downwardly yfaced abutments 9A: with which themember 22 vis adapted to interlock,` upon being `slightly' rotated, forthe purpose of preventing said unit trombeingfraised by the wick, whenthe latter is projected above the Wick tube.,l n The upper portions.ofthe side edges .of

the vanes are provided With knotches 25 in which an air distributingring y26 is A.carriedp this ring' beingv substantially Veshaped incross-section with a truste-conical por-g tion extending inwardly andupwardly from the 'upper edge `.of the linner Wick tube.A

l The verticalfedgesef'the'vanes 1Q closely fit the interior of theWick-tube 11 sopas toxaccurately centerithe flame apreade'uil i and airdistributing 'ring/126 andthe periph;

ery ot thelatter also .closely t's- Within the n Wick tube 11 seas toform an airbarrier' that Will compel the greaterfportion ot the'Vcurrent'o'lE air` that. rises vthrough the tube 11 to pass yaromd :andabove the ring- 261.' For efficient operation ot the burner, l haveoundl that it is; essential to provide a restricted supply .of airldirectly over the-up-v per edge of the inner `Wickv tube, and, tor'kthis :purpose the periphery ot' the ring 2 6' is provided withsrnallnotches 27; which will p permit a restricted lilow of air therethrough;

. ln theniodiliedv form ot air distributers,`

shown in Fig. 5, there is a short corrugated flange 28on` the periphery`oat the ring, the corrugation providing air passages that func tion inthe lsalme manner as the notches 27.

The parts are shown in their normal relation in Fig. 1 and theunitcomprising the vanes 19, the flame spreader 16 and the ring 26, issecurelyheld in this position by Athe engagement of thevmember 22 withthe abutment 24 so that, in case the wick 12 is raised suiiiciently toengage the periphery 17 of the frame spreader, it will not displace thisunit Afrom its `normal setting. When the unit is inserted into the tube11, the member 22will engage with the raised portions 15,

, :ofthe vanes 14, unless the notches 2 3 happen to register-.with theseraised portions. ,The engagement of themember 22 with the p0rtions 16serves to hold said unit in the-posi( tion shown in .Fig, 3 and it willbe per.- fectly apparent to the operator that the unit extend.throughthev openings 32 and `engageV with the underside ofthe ring 30,-wherebyl isnot properlypositioned. However, it will.

onlybe necessary to slightly rotate the unitV to register the Vnotches23, with the portions 15, of thezwings 14, to permit the'unit to drop-to its normal position shown in Fig. 1. Then a slight rotation willinterlock the member 22 with the abutments 24.

`In the form `of the invention illustrated in Figs. 6 to 8, there issecured to the .ledgeV 13 a ring 30 having perforations 31 therein topermit the passage of air, said ring, in effect, being an extensionofthe ledge 13 and having a plurality of notches 32.' The air`distributerf comprises va plurality of wings 33,the outer edges of whichfit within the'inner wick Atube 11i`for the purpose-ofcentering the airdistributer unit. `The. wings 33 `carry the flame spreader 16 and havetheir lower ends bent horizontally `to form feet 34 which engage .withvthe ledge 13 and thus support the unit.. Thel feet 34,'`

of the wings `33, have downwardly projecting extensions 35, of hook-likeform `which the air distributer unit is locked in position and preventedfrom being raised by the wick. When the fair dist-ributer unit is in'-serted'in the inner wick tube 11, the extensions 35 passthrough theopenings 32 and the `unit is then rotated to the position in .'Fig. 7inwhich the'ext'ensions 35 areY inter locked with4 the ring 30. l

In this form of the invention, I have also illustrateda slightmodification of the oonstruction of the air barrier26, of th'e'conl`struction first described. In the modified construction, the air barrier36 consists of a frusto-conical ring having notches 37 in its periphery,this ring being seated in recesses forming an annular wick Aspacetherebetween,

said inner tube having a above said tubes with its periphery project-ingover said space, vertically disposed transversely extending members towhich said spreader is attached, said members resting on Vsaid ledge,anda frusto-conical air` barrier carried by said` membersand closelyfitting :the interior of said inner tube, said air barrier projectingupwardly "and in` wardly from the upper e ge thereof.

2. In burners of the class described, the combination of inner and outerWick tubes forming an annular .wick space therebey tween, said innertube having a ledge on the interior thereof, a fiamespreader arrangedabove said tubes with its periphery rejecting over said space,fvertically transversely extending `members Vto which said 'spreader isattached,` said members rest` i ing on said ledge, andafrusto-conicalair barrier closely fitting the interior of said edge on the interiorthereof, aY flame spreader arranged sposed inner tube and projectingupwardly .and

inwardly from the upper edge thereof, and said air barrier beingprovided with restricted marginal recesses for supplying air,

through said barrier directly to the inner;

edge of said wick space.

3. In burnersofthe class described,.the-

combination of" inner and outer wickftubes forming an annularV `wickspace therebetween,said inner tube having a ledgeon the,

interior thereof, a flame spreader arranged above `said vtubes withitsperiphery projectving over said space, verticall disposed radialvanes to which said sprea er isatta'ched,` said vanesfittngwithintheinner'tube and vrestingon said ledge, Zand altruiste-conicalair barrier carried onfsaid members. and closely fitting the interiorofsad inner tube ma A" andprojecting inwardly and upwardlyfrom the upperedge thereof.'

.4. In Vburnersofthe class described, the i combination of inner. andouter wick tubes forming an annular `wiclr space therebetween, saidinnertube having a ledge ontlie'inte-A rior thereof, a flame spreader`arranged above` said tubes with its periphery projecting over saidspace, vertically'eirtending membersfto which saidspreader is attachedand resting lll) on said ledge, and afrustconical air bari rier carriedon said members and closely tting .the interior of said inner tubeandprojecting inwardly and upwardly from the upper edge thereof and Vsaidair barrier being provided with `restricted marginal recesses forsupplying air through Vsaid ,barrier directly to the inner edgeofsaidwick space.

5.y Inv burners of the class described, the combination of inneri andouter wick, tubes forming an annularwick space therebetween,

. y said inner tube'havinga ledgeon its interior,

and a combined flame spreader and air bar@ rier unit comprising aplurality of vanes rest- Y ing on said ledge, a disk secured to saidvanes and having its peripheral portion arranged over said wick spaceand a rustofconical ring carried on said vanes with its peripheryclosely fitting the interior of said inner tube at its upper end, said`ring being provided with peripheral recesses through which air issupplied to the inner edge of the wick space.

6. In burners or' the class described, the combination of inner andouter Wick tubes ltorming an annular wick space therebetween, said innertube having a ledge on its interior, and a combined iame spreader andair barrier unit comprising a plurality of vanes' resting on said-ledge,a disksecured'to said vanes and having its peripheral p0rtion arrangedover said wick space and a iusto-conical ring carried on said vanes withits periphery closely fitting the interior o't' said inner tube at itsupper end, said ring being provided with peripheral recesses throughwhich air is supplied to the inner edge of the wick space, andyinterlocking means carried by said inner tube and said varies forpreventing said unit from being lifted from its normal position by thewick.

7. In burners of the class described, the combination of inner and outerwick tubes forming an annular wick space therebetween,

a combined iiame spreader and air barrier unit arranged within saidinner Wick tube and extending above the same, a ledge on said ledge andthe interior of said inner wick tube, and a combined supporting andlocking means in relatively fixed relation on said unit engaging the'upper and lower'sides of said ledge.

8. In burners ofthe class described, the combination of inner and outerwiel: tubes forming an annular wick space therebetween, a combined flamespreader and air barrier unit arranged within said innerI wick tube andextending above the same,y a ledgevon the interior of said inner wicktube, and said unit having circumferentially spaced supporting membersengaging the upperside'oil rovided with hooks eirgag-l ing the lowerside of theledge to lock said i unit in position.

9. In burners of the class described, the combination of inner and outerwick tubes forming an annular wick space therebetween,

ledge on the interior .of said inner wick tube provided withcircuniferentially,spaced` openings, and said unit having supportingmembers engaging the upper side'of said.

ledge and having hook-like extensions prof jecting through said openingsand engaging the lower 'side of theledge to lock said unit in position.1

In testimony whereof, I hereunto affix my signature. n

RUDOLPH HOFFMAN.

